基于一体式S波段陶瓷介质滤波器的研究  

Design of Integrated S-band Ceramic Dielectric Filter

作　　者：韦俊杰 蒋廷利 马睿 WEI Junjie;JIANG Tingli;MA Rui(The 26th Institute of China Electronics Technology Group Corporation,Chongqing 400060,China)

机构地区：[1]中国电子科技集团公司第二十六研究所,重庆400060

出　　处：《压电与声光》2024年第5期670-674,684,共6页Piezoelectrics & Acoustooptics

摘　　要：引用CST三维电磁仿真软件提出了一种三阶介质滤波器的设计方法。通过源与第二谐振器或负载与第三谐振器构成级联三节(CT)交叉耦合结构产生传输零点的方式,满足更高频率端的高抑制要求。第二谐振器与第三谐振器开路端电极相连,形成三阶滤波器结构实现了低损耗性能。4个谐振器短路端被缩短,从而扩大了电极可调试区域以简化滤波器的调试复杂度。一体式介质滤波器采用介电常数为45.9的陶瓷材料制作样品并进行测试。测试结果表明,所设计的介质滤波器1 dB带宽为117 MHz,通带频率范围2084~2104 MHz的插入损耗(IL)小于1.2 dB,通带驻波比小于1.28,高端频率2.2 GHz处的衰减为34.35 dB,低端频率1.6 GHz处的抑制为31.04 dB,滤波器外形尺寸为10.41 mm×3.7 mm×4.57 mm。测试结果与仿真结果吻合度高。This study proposes a three-order dielectric filter design method using the CST 3D electromagnetic simulation software package.The transmission zero is generated by a cascade three-section(CT)cross-coupling structure between the source and second resonator,or load and third resonator to achieve high suppression requirements at higher frequencies.The second and third resonators’open-end electrodes are connected to form a three-order filter structure to achieve low loss performance.The short-circuit end of the four resonators is shortened to expand the electrode debugging area to simplify filter debugging complexity.The integrated dielectric filter sample was fabricated using ceramic material with a dielectric constant of 45.99,and subsequently tested.The proposed dielectric filter had a 1 dB bandwidth of 117 MHz in the 2084-2104 MHz passband frequency range.The insertion loss(IL)was less than 1.2 dB,and the passband standing wave ratio was less than 1.28.The attenuation was 34.35 dB at a higher frequency of 2.2 GHz and 31.04 dB at a lower frequency of 1.6 GHz,and the size was 10.41 mm×3.7 mm×4.57 mm.Finally,it was confirmed that the test results were in good agreement with the simulation results.

关 键 词：耦合矩阵 电磁仿真软件CST 陶瓷介质滤波器 谐振器 交叉耦合结构 

分 类 号：TN713[电子电信—电路与系统]